Tack-pulling machine



Jan. 18,1927. w 1,614,628

C. F. PYM

TACK PULLING MACHINE Filed July 5, 1922 /NZ/EN TOR Patented Jan. 18,1927. I H 1,614,628

'UNTTE D S TK T ES PA T E N T O F F I C E CHARLES F. PYM, OF LYNN, MASSACHUSETTS, ASSIGNOR T UNITED SHOE MACHIN- ERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JER- SEY.

TACK-PULLING MACHINE.

Application filed July 3, 1922. Serial No. 572,429.

This invention relates to machines for the work. With this object in view a feapulling tacks and is herein illustrated as ture of the invention comprises the combiembodied in a tack pulling machine having nation with a rotary tack pulling tool of a a rotary tool with a transverse tack pulling resiliently mounted housing or guard therecdge by which lasting and other tacks are for arranged normally to prevent the tack extracted from shoes. pulling tool from biting into the work but The tack engaging edge of the tack pullyieldable as by pressure applied throu h the ing blade of a machine of this character be- Work to permit the pulling means of t 1e tool comes worn or nicked in the course of its to enter beneath the head of the tack with 0 use and it is necessary from time to time to a minimum cutting of the surface of the regrind and har n it, I thi way th work when necessary to permit the extracsubstance of the pulling blade is gradually ti n of a deeply driven tack.

reduced. Accordingly blades of this kind With the above a d Other O j cts and feaare so mounted that they may be adjusted tures in view, the invention will now be de- 65 t compensate f th 1 f aterial and scribed with reference to the accompanying to bring their tack engaging edges back indrawings, which illustrate preferred emto proper relation to the parts in which bodiments thereof, and pointed out in the they are. mounted and to the work. subjoined Claims.

With this in view it is an object of the Fig. 1 is a side elevation, partly in cross 7 present invention to provide a tack puller section, of a rotary tack pulling tool cmof this character which shall be simple and odying the present invention;

inexpensive to manufacture, eflicient in op- Fig- 2 is a cross section on the line 22 eration, and which at the same time shall of Fig. 1 showing also the operative relapossess the feature of adjustability of the tion of the tool to a tack to be pulled from tack pulling blade to compensate for wear a lasted shoe;

thereof over a considerable period; so that Fig. 3 is a side elevation, partly in section,

the blade will have a long life and will need and Fig. 4 is an end view of a tack pulling only infrequent renewal. To this end, the tool having a yieldingly mounted guard to invention provides a rotary tack pulling facilitate the extraction of deeply driven t5) tool having an adjustably mounted tack tacks.

pulling blade the body of which is arcuate The tool of Figs. 1 and 2 is provided and isof substantially uniform cross-section with a hub 6 formed with a screw-threaded throughout a major portion of its length. shank 8 arranged to be received in a thread- Rotary tack pullers of the character dised hole of arotary shaft 9. Hub 6 is formed closed herein are commonly used to pull with a guard flange 10 and with a circular t k b hi h th soles f t rn ho and groove 12 eccentric with respect to the axis th i l f th types f hoes are, atof rotation of the tool, and arranged to tached to lasts during the earlier operations receive a tack pulling blade 14, the body in the ,u'laufacture of shoes. These tacks are of which is arcuate in form from end to to frequently driven in so far that their heads end and illustrated as curved through about are flush or in some. cases slightly below the three hundred degrees, being uniform in surface of the insole. Under these circumcross-section throughthe major portion of stances the pulling operation usually entails its length. This blade is clamped in posimore or less cutting or tearing of the insole. tion in the groove by a cap plate 16, the Accordingly it is a further object of the periphery of which, is formed as a guard present invention to provide a construction flange 18 of the same diameter as guard which will permit the extraction of tacks flange 10. Since the groove 12 is closed at which are driven in so far that their heads its outer side by the cap plate, there is furare sunk beneath the surface of the insole nished a passage to receive the blade, which or other article, and which may be relied uppassage opens only at its ends between the on to do this with a minimum mutilation of guard flanges. A screw 20 threaded into an pulling opening in hub 6 clamps the cap plate 16 of th arcuate tack pulling blade 1% to the hub 6.

As clearly shown in Fig. 1, the tack pulling blade H is approximately rectangular in cross section with its outer surface, however, convex so that the tack pulling edge of the plate, formed by cutting or grinding the end of the blade at an acute angle, is convex and of a form readily to engage the head of a tack to be pulled.

As illustrated cap plate 16 is formed with an opening 22 to permit the escape of debris from the space between the tack pulling blade, the cap plate and'the hub, and to assist in assembling the parts of the tool the cap plate 16 and the hub 6 may conveniently be provided with registering holes arranged to receive a pin 2%.

, ll ith a tack pulling blade of the character illustrated and conforming in shape to groove 12, it is apparent from a consideration of Fig. 2 that very substantially more than half of the substance of the blade may 'be worn away by repeated grindings before the blade will be so short that it can no longer be secured in position and must be replaced by a new blade.

As illustrated in Figs. 3 and l, the tack tool is formed without the guard flanges 10 and 18 of Figs. 1 and 2'but' is otherwise similar to the construction of those figures, except that a single screw 21 is used both to clamp the tack pulling blade. 14 to the hub and to clamp the hub to the drive shaft 10. It is provided, however, with a housing or guard casing 26 suitably apertured as at 28, SOto permit the assembling of the device and supported independently of the rotary tack puller by a moderately stiff and resilient spring member 32,

illustrated as a-- leaf spring secured by suitable screws to the bearing of shaft 9. Suitable clearance is provided between the rotary tack pulling tool and the casing 26 topermit the latter to yield upwardly under pressure'applied by the shoe without contacting with the tack pulling member so that deeply embedded tacks may be extracted. At the same time housing 26 is normally operative to prevent the blade llfrom digging into the work when such action not necessary.

As illustrated, one wall ofthe housing 26 is formed as a work rest 3A secured to the remainder of the housing as by an adjustable screw and slot connection, and this work rest is roughened at its lower end 38. The work may conveniently be rested against this, and rocked about it asa fulcrum, as it ismanipulated to presentthe tacks to the pulling tool.

Having described my invention, what I claim as new anddesire to secure 'by Letters Patent" of the United States is 1. A: rotary tack pulling tool having'an nsieezs adjustably mounted tack pulling blade the body of which is arcuate and is of substantially uniform cross-section throughout a major portion of its length.

2. A rotary tack ulling' tool having a circular eccentric wit 1 respect to its axis of rotation, and an arcuate tack pulling blade *onforn'iing in shape to and secured insaid groove.

3. A tack pulling tool having a blade the body ofwhich is arcuate in form from end to end with the outer surface of the blade convex throughout the length of the body.

l. A rotary tack pulling tool having a circular guard flange and a tack pullingvtool formed on an arc and so disposed that the inner and outer'walls of any portion of its body are at one side of the axis of rotation, said tool being clamped ecoentrically with respect to said guard flange.

5. A rotary tack pulling tool having a pair of guard flanges and a peripherally closed passage opening at its end between the flanges, and an arcuate" tack pulling blade eccentrically clamped in the passageand extending between the guard flanges.

6. A rotary tack pullingtoolha-ving a pair of guard'flanges, oneof the guard flanges being formed upon a member having an eccen trio groove thereiinan'd an arcuat'e tack pulling blade adjustab'ly clamped in said groove betweenthe guard flanges.

7. A tack pulling machine having, in combination, a rotary t'ack pulling tool a leaf spring, and a guard for the tack pulling tool carried by the leaf spring and-arranged normally to prevent the tack pulling tool from digging into the work, but yieldable tofacilitat'e theextraction of deeply driven tacks.

8. A tackpulling machine having, in combination,-a rotary t'a'ckpulling'tool, a guard therefor and aspringarranged-to carry and support' tho guard and normally to hold the guard in position' to prevent the tack pulling tool from digging into the work but yieldable'to permit the tack pulling tool to dig into the work to extract deeply driven tacks.

9; A tack pulling machine having, in combination, a shaft, a bearing member therefor, a rotary tack pulling tool carried by the shaft, a guard member in which the tack pulling tool is mounted, and a spring secured-at one end to the bearing member, and 'arrying at its other end theguardmember normally in position to prevent the tack pullingtool from'digging into the workbut yieldable to permit relative movement of the tack-pulling toolan'd the guard to facilitate theextractio'n of deeply driven ta oks;

10. A rotary tack pullingrtool having a circular guard flange and an arcuate tack pulling:bladehaving a curvature of at least one hundrediand eighty degrees adjustably ingly mounted guard therefor arranged to prevent the tack pulling tool from digging 10 into the WOIk and havin one of its Walls formed as a work rest ad uStabIe in a direction towards and from the work.

In testimony whereof I have signed my name to this specification.

CHARLES F. PYM.

CERTIFICATE 6i? GORREGTEONW Patent No. 1,644,628. daziliary E8, 1927, to

CHARLES PYM.

It is hereby wrtified that error agipears in the printed speciiicai'ion 0f the above numbered parent requiring eerrectirm ialiaws: Page i, iine 93, for the word "through'. read "thr0ugh0ui;; gage 2, line 7.1, claim 2 after "Circular" insert the words "passage elased at its outer side and"; same page. line 99, claim 7, after the word "m0!" insefl a camma; and that the said Letters Patent should be read with these wrrectidns therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 30th day 0? August, A, D. 1927.

M. J. Moore, Seal. Acting Commissioner of Patents.

CERTIFICATE 3i CORREGTEONG Patent No. 1,614, 628i Giiiiiitfitl ,iariuary 18, 1927, to

CHARLES E. PYM.

It is hereby certified that error appears in the printetl specification of the above numbered patent requiring correction as follows: iage 1, line 93, for the word "through? read "throughout"; gage 2, line 71, claim insert the Words "passage elosed at its outer side and" claim 7, after the word "teo! insert a comma; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 30th day of August, A, D. 1927.

2, after "circular" same page line 99,

M. J. Moore, Seal. Acting Commissioner of Patento. 

